Malicious PDF — malware analysis report

Static analysis result for SHA-256 12eba362caec3fb3…

MALICIOUS

PDF

107.1 KB Created: 2021-08-13 16:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7d61c815aaa31dccfd4ec6e989017a65 SHA-1: d4d26809ee9cc56659144441ebae8e82ada7cb85 SHA-256: 12eba362caec3fb3fc7af002a2271e9fa571a081be4281b712463f6f1fa824c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of a link farm pointing to multiple distinct hosts, some of which appear to be compromised CMS uploads, further indicates a malicious intent, likely for phishing or malware distribution. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://wecans.net/_UploadFile/Images/file/pojisolixogawofojifum.pdf In PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebd2c21f01---58399207640.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/435ebf3c7af6cd720f446584e1d784e7/52744024408.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/76860933966.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/66601619685.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/35610722453.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/ligibomogidugepo.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/155cb83e41f274f9a7eee40279aa892b/50530623349.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e62993bb902---88152410009.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b7237328c64---powagilemobutesofa.pdfIn PDF document text
    • https://magnificenttreks.com/userfiles/file/41477695881.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/larawowotikunu.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/63511365032.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/lemomabetapazanudam.pdfIn PDF document text
    • http://dwhs79.com/clients/15834/File/saxizegefugazozunepamegef.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021061418123073499.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/kupowopesine.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071d12995b34---38604348379.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f56740dd7d---67514620189.pdfIn PDF document text
    • http://momsystem.ru/public/file/3246760831.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/geteroforagid.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/wiluxos.pdfIn PDF document text
    • http://ashioke.com/images/library/File/27721633662.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/duroxakuza.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/74009075880.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/subagimutizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+change+settings+on+lost+vape+orionPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001539d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1539D 19084 bytes
SHA-256: c3b337ebc84306557324f6aaee9b6d1165d23895db1d9774cb4a381ad76597a2
font_02_sfnt_off00018420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18420 10796 bytes
SHA-256: 30354054236bbe55999b1334f3740af0e30ba13161f1853e5dc50a9c3ad5717f

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